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LibHTML: Implement naive hit testing

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We don't have proper line boxes yet, so we can't easily hit test
inline text.
This commit is contained in:
Andreas Kling 2019-09-28 23:02:22 +02:00
parent 3ed41abba4
commit 3de4b99dc3
4 changed files with 38 additions and 0 deletions
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14
Libraries/LibHTML/Layout/LayoutNode.cpp
View file

@ -1,3 +1,4 @@
#include <LibHTML/DOM/Element.h>
#include <LibHTML/Layout/LayoutBlock.h>
#include <LibHTML/Layout/LayoutNode.h>
@ -34,3 +35,16 @@ void LayoutNode::render(RenderingContext& context)
child.render(context);
});
}
HitTestResult LayoutNode::hit_test(const Point& position) const
{
if (!m_rect.contains(position))
return {};
HitTestResult result { this };
for_each_child([&](auto& child) {
auto child_result = child.hit_test(position);
if (child_result.layout_node)
result = child_result;
});
return result;
}

8
Libraries/LibHTML/Layout/LayoutNode.h
View file

@ -9,7 +9,13 @@
#include <LibHTML/TreeNode.h>
class Node;
class Element;
class LayoutBlock;
class LayoutNode;
struct HitTestResult {
RefPtr<LayoutNode> layout_node;
};
class LayoutNode : public TreeNode<LayoutNode> {
public:
@ -22,6 +28,8 @@ public:
ComputedStyle& style() { return m_style; }
const ComputedStyle& style() const { return m_style; }
virtual HitTestResult hit_test(const Point&) const;
bool is_anonymous() const { return !m_node; }
const Node* node() const { return m_node; }